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Reversible photomodification of LiNbO 3 and LiTaO 3 by femtosecond laser pulses

Mizeikis, Vyngantas; Juodkazis, Saulius; Sudzius, Markas; Misawa, Hiroaki; Gamaly, Eugene G; Rode, Andrei V; Kitamura, Kenji; Krolikowski, Wieslaw

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We present experimental and theoretical study of refractive index modification induced by femtosecond laser pulses in photorefractive crystals. The single pulses with central wavelength of 800 nm, pulse duration of 150 fs, and energy in the range of 6-130 nJ, tightly focused into the bulk of Fe-doped LiNbO3 and stoichiometric LiTaO3 crystals induce refractive index change of up to about 10-3 within the volume of about (2,0 × 2,0 × 8,0) μm3. The photomodification is independent of the...[Show more]

dc.contributor.authorMizeikis, Vyngantas
dc.contributor.authorJuodkazis, Saulius
dc.contributor.authorSudzius, Markas
dc.contributor.authorMisawa, Hiroaki
dc.contributor.authorGamaly, Eugene G
dc.contributor.authorRode, Andrei V
dc.contributor.authorKitamura, Kenji
dc.contributor.authorKrolikowski, Wieslaw
dc.date.accessioned2015-12-08T22:42:18Z
dc.identifier.issn1605-7422
dc.identifier.urihttp://hdl.handle.net/1885/37038
dc.description.abstractWe present experimental and theoretical study of refractive index modification induced by femtosecond laser pulses in photorefractive crystals. The single pulses with central wavelength of 800 nm, pulse duration of 150 fs, and energy in the range of 6-130 nJ, tightly focused into the bulk of Fe-doped LiNbO3 and stoichiometric LiTaO3 crystals induce refractive index change of up to about 10-3 within the volume of about (2,0 × 2,0 × 8,0) μm3. The photomodification is independent of the polarization orientation with respect to the crystalline c-axis. The recorded region can be erased optically by a defocused low-intensity single pulse of the same laser. Recording and erasure can be repeated at the same position many times without loss of quality. These findings demonstrate the basic functionality of the ultrafast three-dimensional all-optical rewritable memory. Theoretically they are interpreted by taking into account electron photogeneration and recombination, as well as formation of a space-charge field. The presented analysis indicates dominant role of photovoltaic effect for our experimental conditions, and suggests methods for controlling various parameters of the photomodified regions. Rewritable optical memory,.
dc.publisherSPIE - The International Society for Optical Engineering
dc.sourceProceedings of SPIE - Progress in Biomedical Optics and Imaging
dc.subjectKeywords: Electric space charge; Laser pulses; Optical data storage; Photorefractive crystals; LiNbO3; LiTaO3; Optical rewritable memory; Photomodification; Space-charge field; Lithium compounds LiNbO3; LiTaO3; Modification by femtosecond pulses
dc.titleReversible photomodification of LiNbO 3 and LiTaO 3 by femtosecond laser pulses
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume6801
dc.date.issued2008
local.identifier.absfor091299 - Materials Engineering not elsewhere classified
local.identifier.ariespublicationu9912193xPUB143
local.type.statusPublished Version
local.contributor.affiliationMizeikis, Vyngantas, Hokkaido University
local.contributor.affiliationJuodkazis, Saulius, Hokkaido University
local.contributor.affiliationSudzius, Markas, Vilnius University
local.contributor.affiliationMisawa, Hiroaki, Hokkaido University
local.contributor.affiliationGamaly, Eugene G, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationRode, Andrei V, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationKrolikowski, Wieslaw, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationKitamura, Kenji, National Institute for Materials Science
local.description.embargo2037-12-31
local.bibliographicCitation.startpage680106 1
local.bibliographicCitation.lastpage11
local.identifier.doi10.1117/12.759232
dc.date.updated2015-12-08T10:35:17Z
local.identifier.scopusID2-s2.0-41149157630
CollectionsANU Research Publications

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